Holding oven



FIG. 1 is a front perspective view of a holding oven of the present invention;

FIG. 2 is a front elevational view of the present invention;

FIG. 3 is a rear elevational view of the present invention;

FIG. 4 is a left side view of the present invention;

FIG. 5 is a right side view of the present invention;

FIG. 6 is a top view of the present invention; and,

FIG. 7 is a bottom view of the present invention.

The broken line showing of environment in the drawings is included for the purpose of illustrating only and forms no part of the claimed design. 

The ornamental design for a holding oven, as shown and described. 